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It generally uses a solution of about 10-percent citric acid.
I am not familiar with the Summa process. When
looking into it, it appears to be a tradename process for
electropolishing stainless steel. This process could also be
a consideration, although requires additional equipment
like rectifiers and racks. As a result, it may be more expen-
sive than a basic passivation process, but could leave the
surface with a brighter and smoother finish.
Brass Cleaning
Q. How do I clean brass to be powder coated?
A. Assuming you have some mill oil or metalworking lubricant
on the surface of the brass, the minimum pretreatment
needed is a degreasing of some type. Depending on what
you have available and the number and size of your parts,
that could range from a manual wiping with a solvent from
your hardware store (naphtha or mineral spirits) with clean,
lint-free rags, to a fully automated, conveyorized spray wash
system. You will need to make the decision as to what to do
based on the size of the operation you are undertaking.
If only applying a clear powder coat, then you will need
to brighten the brass in some way. This can be accomplished
by use of specially formulated cleaners. Most are mildly to
strongly acidic. This deoxidizes and brightens the surface
prior to powder coating. Most of these chemicals can be
provided by suppliers at listed on PFonline.com .
Consider
Contact us today to learn how
we can improve your cleaning
and stripping applications and
save you time and money.
Natrium
®
Soda Blast
More Productive
Less Dust
866-635-3417
www.natriumsodablast.com
PRODUCTS FINISHING — PFonline.com
35
THE VOICE OF FINISHING
80
YEARS
PARTS CLEANING
CLINIC